AT88SC0404CA-PU Atmel, AT88SC0404CA-PU Datasheet - Page 34

• Manufacturer Part Number: AT88SC0404CA-PU
• Description: IC EEPROM 4KBIT 4MHZ 8DIP
• Manufacturer: Atmel
• Series: CryptoMemory®r

Specifications of AT88SC0404CA-PU

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 4K (512 x 8)
• Speed: 4MHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• For Use With: AT88SC-SDK1 - KIT TUEMA DK CRYPTOMEM SMARTCARDAT88SC-DK1 - KIT DEV FOR AT88SCXXXXC FAMILY
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.8.2. Read User Zone: $B2
8.8.3. Functional
8664C–CRYPT–01/10
S
T
A
R
T
Command
xxxx xxx0
WRITE
Figure 18. Random Read Command Structure
Figure 19. Read User Zone Command Functional Description
The Read User Zone command $B2 allows reading of data from the device's currently selected user zone (the
procedure for selecting a user zone is described below).
The data byte address to be read is defined by Address 1 and Address 2 in the command and is internally incremented
following the transmission of each data byte. The value N defines how many bytes Atmel
value of zero will result in 256-bytes read. The host however may cease clocking the device and end the transmission
with a NACK and STOP at any time prior to receiving all N-bytes. During a read operation the address will "roll over"
from the last byte of the current zone, to the first byte of the same zone.
If the host is not allowed to read the zone, the device will not acknowledge the N-byte.
Figure 20. Read User Zone Command Structure
R
S
T
A
T
Command
1011 0010
A
C
K
0000 0000
Address 1
C
A
K
Address 1
Number of bytes N
xxxx xxxx
Read Command
Address 1
Address 2
A
C
K
Host
0a6-- ---a0
Address 2
A
C
K
Address 2
xxxx xxxx
A
C
K
Atmel AT88SC0104/0204/0404/0808/CA
n7--- ---n0
A
C
K
Device
N
Data
Data
…
xxxx xxxx
N
A
C
K
N
C
A
K
S
T
A
R
T
A
C
K
Random Read
Command
xxxx 0001
d7--- ---d0
N data bytes
Data
C
A
K
C
A
K
Data x N
d7--- ---d0
d7--- ---d0
Data
®
CryptoMemory
N
C
A
K
A
C
K
O
S
T
P
d7--- ---d0
Data x N
®
will read, a
N
A
C
K
33
O
S
T
P